1. in an extremely angry manner
2. with great speed, energy, or intensity

Examples

• She furiously slammed the door after the argument.
• The customer complained furiously about the poor service.
• He worked furiously to finish the project before the deadline.
• The storm raged furiously throughout the night.
• She typed furiously to complete her essay on time.
• The dog barked furiously at the intruder.
• Rain pounded furiously against the windows.